Pain when you close your hand into a fist points to issues with your flexor hand muscles, specifically flexor digitorum superficialis, flexor digitorum profundus, and flexor pollicis longus. Coincidentally the tendons of all these muscles goes through your carpal tunnel in your wrist/hand. Compression and inflammation of these tendons may be causing you this throbbing pain. You may also experience tingling of nerves from your forearm up to your shoulder (compression of median nerve).Septimus wrote:After 500 miles of riding over labor day weekend, my fingers feel like they're going to fall off.
... It's now a couple days later and if I close my hand into a fist, there's a sort of dull, throbbing pain. It's not at all serious - barely even a nuisance -- ...but it seems like a couple hours of vibration could be responsible.
You already know how you got the compression, so you know to change your body position on your next long ride.
To help you with your pain you could do a couple of things. Ice your wrist, 20 mins on, 20 mins off, for 48 hrs or while still experiencing pain, which might reduce the inflamation. You could also try a NSAID (non-steroidal anti-inflammatory drug) such as aspirin or ibuprofen. If you are a teenager/child do not take aspirin. Acetaminophen (tylenol)/paracetamol is not an NSAID and therefore will not work. Seek your doctor's advice, I am not a doctor.
You may want to take a break from riding while you still experience pain.